Coldet on OS X / 3D Collision Detection Libraries

I'm trying to do some 3D collision detection ('simple' ray-polygon intersection), so I'm looking for some 3D collision detection libraries. If anyone knows of any I would be very grateful. Note I'm looking for detection only, not physics or the resulting action; my game will only have simple 'physics' - move down slope/jump/hit wall.

I tried Coldet, but the furthest I got was to compiling, whereby I didn't, because I couldn't find the correct (read "any") library to use on OS X.
Any help/tutorials on Coldet would also be great; it seems like exactly what I'm looking for =]
Thanks in advance.